Abstract: An electrolyte and a lithium secondary battery including the same. The electrolyte includes a lithium salt; an organic solvent; and at least one siloxane compound represented by Formula 1 or Formula 2, wherein an amount of the at least one siloxane compound is about 0.05 wt % to about 20 wt % based on a total weight of the electrolyte. In Formulae 1 and 2, group substituents and number indices are as defined in the specification.

Abstract: A lithium battery including: a cathode; an anode; and an electrolyte between the cathode and the anode, wherein the electrolyte includes a lithium salt and a non-aqueous solvent including ethylene carbonate (EC), an amount of the EC per 100 parts by volume of the non-aqueous solvent is about 5 parts by volume to about 15 parts by volume, and wherein the cathode includes a cathode active material represented by Formula 1, LixNiyM1-yO2-zAz??Formula 1 wherein, in Formula 1, 0.9?x?1.2, 0.7?y?0.98, and 0?z?0.2, M is Al, Mg, Mn, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Bi, or a combination thereof, and A is an element having an oxidation number of ?1 or ?2, wherein each element of M is independently present in an amount of 0<(1?y)?0.3, wherein an total content of M is 0.02?(1?y)?0.3.

Abstract: A lithium secondary battery includes: a positive electrode; a negative electrode; and an electrolyte between the positive electrode and the negative electrode, wherein the positive electrode includes a positive active material represented by Formula 1, and the electrolyte includes a lithium salt, a non-aqueous solvent, and a sulfone compound represented by Formula 2. wherein, in Formula 1, 0.9?x?1.2, 0.7?y?0.98, 0?z<0.2, M comprises Al, Mg, Mn, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Bi, or a combination thereof, and A is a monovalent anion, a divalent anion, or a combination thereof, and in Formula 2, R1 and R2 are each independently a halogen, an unsubstituted C1-C10 alkyl group, or a C1-C10 alkyl group substituted with a halogen, and a1 and a2 are each independently an integer from 0 to 5.

Abstract: A lithium battery including: a cathode; an anode; and an electrolyte between the cathode and the anode, wherein the cathode includes a cathode active material represented by Formula 1, LixNiyM1?yO2-zAz??Formula 1 wherein 0.95?x?1.2, 0.75?y?0.98, and 0?z<0.2, M is Al, Mg, Mn, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Bi, or a combination thereof, and A is an element having an oxidation number of ?1, ?2, or ?3, wherein each element of M is independently present in an amount of 0.02?y?0.3, wherein a total content of M is 0.02?y?0.3; and wherein the electrolyte includes a lithium salt, a non-aqueous solvent, and a diallyl compound represented by Formula 2, wherein L1 and L2 are each independently a single bond, a C1-C20 alkylene group, or a substituted or unsubstituted C2-C20 alkenylene group.

Abstract: An electrolyte including: a lithium salt; a non-aqueous solvent; a compound represented by Formula 1; and a compound represented by Formula 2 wherein R1, R2, R3, R11, and R12 in Formulae 1 and 2 are as described in the detailed description.

Abstract: A lithium secondary battery including a cathode; an anode; and an electrolyte disposed between the cathode and the anode, wherein the cathode includes a cathode active material represented by Formula 1, the electrolyte includes a lithium salt; a non-aqueous solvent; and a monofluorosilane compound represented by Formula 2, wherein an amount of the monofluorosilane compound is in a range of about 0.1 percent by weight (wt %) to about 5 wt % based on the total weight of the electrolyte wherein, in Formula 1, 0.9?x?1.2, 0.85<y?0.95, and 0?z<0.2; M is aluminum, magnesium, manganese, cobalt, iron, chromium, vanadium, titanium, copper, boron, calcium, zinc, zirconium, niobium, molybdenum, strontium, antimony, tungsten, bismuth, or a combination thereof; A is an element having an oxidation number of ?1 or ?2, and R1 is a substituted or unsubstituted linear or branched C2-C30 alkyl group or a substituted or unsubstituted C6-C60 aryl group.

Abstract: A lithium secondary battery includes: a positive electrode; an negative electrode; and an electrolyte between the positive electrode and the negative electrode, wherein the positive electrode includes a positive active material represented by Formula 1, the electrolyte includes a lithium salt, a non-aqueous solvent, and a trialkoxyalkylsilane compound represented by Formula 2, and an amount of the trialkoxyalkylsilane compound in the electrolyte is about 0.1 weight percent to about 5 weight percent based on a total weight of the electrolyte: wherein, in Formula 1 and Formula 2, x, y, z, M, A, R1 to R3, and Ar are as defined as the specification.

Abstract: An electrolyte includes: a lithium salt; a non-aqueous solvent; and a disulfonate compound represented by Formula 1: wherein, in Formula 1, R1 and R2 are each independently a fluorine, a cyano group, a nitro group, or a methyl group substituted with at least one fluorine, R11 to R14 are each independently a hydrogen, a deuterium, a fluorine, a hydroxyl group, a cyano group, a nitro group, a substituted or unsubstituted C1-C10 alkyl group, a substituted or unsubstituted C2-C10 alkenyl group, or a substituted or unsubstituted C2-C10 alkynyl group, a1 and a2 are each independently an integer of 1 to 5, a11 and a12 are each independently an integer of 0 to 4, and a sum of a1 and a11 is 5, and a sum of a2 and a12 is 5.

Abstract: An electrolyte for a lithium secondary battery, the electrolyte including: a compound represented by Formula 1; a lithium salt; and an organic solvent, wherein an amount of the compound represented by Formula 1 is less than about 3.0 weight percent, based on a total weight of the electrolyte: wherein, in Formula 1, R1 to R15 are each independently selected from hydrogen, fluorine, a C1-C10 alkyl group, and a C6-C10 aryl group.

Abstract: An electrolyte additive for a lithium battery comprising a sulfone compound represented by Formula 1: wherein, in Formula 1, R1 is a halogen-substituted or unsubstituted C1-C5 alkyl group, a halogen-substituted or unsubstituted C4-C10 cycloalkyl group, a halogen-substituted or unsubstituted C5-C10 aryl group, or a halogen-substituted or unsubstituted C2-C10 heteroaryl group, and R2 is a halogen-substituted or unsubstituted C2-C10 alkenyl group.

Abstract: An electrolyte includes: a lithium salt; a non-aqueous solvent; and an unsaturated compound represented by Formula 2: wherein definitions of x, y, z, M, A, Q1, and Q2 in Formula 1 and Formula 2 are the same as those described in the description.

Abstract: An electrolyte including: a lithium salt, a non-aqueous solvent, an alkyl sulfonate compound represented by Formula 2, and an unsaturated sulfone compound represented by Formula 3: wherein, in Formula 2, Q1 and Q2 are each independently a substituted or unsubstituted C1-C20 alkyl group, and in Formula 3, Q3 and Q4 are each independently a group represented by -(L1)-(R1), a vinyl group, an allyl group, or a substituted or unsubstituted C1-C20 alkyl group, and at least one of Q3 or Q4 is a group represented by -(L1)-(R1), a vinyl group, or an allyl group, Li is a substituted or unsubstituted C2-C20 alkenylene group or a substituted or unsubstituted C2-C20 alkynylene group, and Ri is hydrogen or a substituted or unsubstituted C2-C20 alkyl group.

Abstract: An organic electrolyte solution includes a lithium salt; an organic solvent; and a fluorine-containing phosphate compound represented by Formula 1: wherein, in Formula 1, R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, and R15 are each independently a hydrogen atom, a fluorine atom, a C1-C5 alkyl group substituted or not substituted with a halogen atom, a C4-C10 cycloalkyl group substituted or not substituted with a halogen atom, a C6-C10 aryl group substituted or not substituted with a halogen atom, a C2-C10 heteroaryl group substituted or not substituted with a halogen atom, or a C2-C10 alkenyl group substituted or not substituted with a halogen atom, at least one of R1, R2, R3, R4, R5, R6, R7, R8, R9, R10, R11, R12, R13, R14, or R15 is a fluorine atom, and at least one phenyl group does not have a fluorine atom.

Abstract: An electrolyte and a lithium secondary battery including the same. The electrolyte includes a lithium salt; an organic solvent; and at least one siloxane compound represented by Formula 1 or Formula 2, wherein an amount of the at least one siloxane compound is about 0.05 wt % to about 20 wt % based on a total weight of the electrolyte. In Formulae 1 and 2, group substituents and number indices are as defined in the specification.

Abstract: An electrolyte including: a lithium salt; a non-aqueous solvent; a compound represented by Formula 1; and a compound represented by Formula 2 wherein R1, R2, R3, R11, and R12 in Formulae 1 and 2 are as described in the detailed description.

Abstract: A lithium secondary battery includes a positive electrode; a negative electrode; and an electrolyte disposed between the positive electrode and the negative electrode, wherein the positive electrode includes a positive active material represented by Formula 1, and the electrolyte includes a lithium salt; a non-aqueous solvent; and a phosphite compound represented by Formula 2, wherein the phosphite compound is present in amount of about 0.1 wt % to about 5 wt % based on a total weight of the electrolyte: LixNiyM1-yO2-zAz??Formula 1 wherein, in Formula 1, 0.9?x?1.2, 0.7?y?0.98, and 0?z<0.2; M comprises Al, Mg, Mn, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Bi, or a combination thereof; and A is an element having an oxidation number of ?1 or ?2; wherein in Formula 2, R1 to R3 are independently an unsubstituted C1-C30 alkyl group or an unsubstituted C6-C60 aryl group.

Abstract: An electrolyte including: a lithium salt; an organic solvent; a sulfone compound represented by Formula 1; and a phosphate compound represented by Formula 2 wherein definitions of R11, R12, R21, R22, and R23 in Formulae 1 and 2 are provided in the detailed description of the present disclosure.

Abstract: A lithium battery including: a cathode; an anode; and an electrolyte between the cathode and the anode, wherein the cathode includes a cathode active material represented by Formula 1, LixNiyM1?yO2-zAz??Formula 1 wherein 0.95?x?1.2, 0.75?y?0.98, and 0?z<0.2, M is Al, Mg, Mn, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Bi, or a combination thereof, and A is an element having an oxidation number of ?1, ?2, or ?3, wherein each element of M is independently present in an amount of 0.02?y?0.3, wherein a total content of M is 0.02?y?0.3; and wherein the electrolyte includes a lithium salt, a non-aqueous solvent, and a diallyl compound represented by Formula 2, wherein L1 and L2 are each independently a single bond, a C1-C20 alkylene group, or a substituted or unsubstituted C2-C20 alkenylene group.

Abstract: A lithium secondary battery including a cathode; an anode; and an electrolyte disposed between the cathode and the anode, wherein the cathode includes a cathode active material represented by Formula 1, the electrolyte includes a lithium salt; a non-aqueous solvent; and a monofluorosilane compound represented by Formula 2, wherein an amount of the monofluorosilane compound is in a range of about 0.1 percent by weight (wt %) to about 5 wt % based on the total weight of the electrolyte wherein, in Formula 1, 0.9?x?1.2, 0.85<y?0.95, and 0?z<0.2; M is aluminum, magnesium, manganese, cobalt, iron, chromium, vanadium, titanium, copper, boron, calcium, zinc, zirconium, niobium, molybdenum, strontium, antimony, tungsten, bismuth, or a combination thereof; A is an element having an oxidation number of ?1 or ?2, and R1 is a substituted or unsubstituted linear or branched C2-C30 alkyl group or a substituted or unsubstituted C6-C60 aryl group.

Abstract: A lithium battery including: a cathode; an anode; and an electrolyte between the cathode and the anode, wherein the electrolyte includes a lithium salt and a non-aqueous solvent including ethylene carbonate (EC), an amount of the EC per 100 parts by volume of the non-aqueous solvent is about 5 parts by volume to about 15 parts by volume, and wherein the cathode includes a cathode active material represented by Formula 1, LixNiyM1-yO2-zAz ??Formula 1 wherein, in Formula 1, 0.9?x?1.2, 0.7?y?0.98, and 0?z?0.2, M is Al, Mg, Mn, Co, Fe, Cr, V, Ti, Cu, B, Ca, Zn, Zr, Nb, Mo, Sr, Sb, W, Bi, or a combination thereof, and A is an element having an oxidation number of ?1 or ?2, wherein each element of M is independently present in an amount of 0<(1?y)?0.3, wherein an total content of M is 0.02?(1?y)?0.3.